Question: What is the domain of a galaxy group or cluster which is under the chronology of topic in the history of astronomy?
Paraphrase: What is the space of a world bunch or cluster which is beneath the chronology of subject within the history of astronomy?
SPARQL (Wikidata): SELECT ?answer WHERE { wd:Q17512228 wdt:P2579 ?answer . ?answer wdt:P2184 wd:Q50056}